fix: include created_at in price_snapshot key monitor query

Avoid IndexError when rendering false breakout gate preview after the gate UI change.

Co-authored-by: Cursor <cursoragent@cursor.com>

crypto_monitor_gate_bot/app.py

@@ -6411,7 +6411,7 @@ def api_account_snapshot():
 def api_price_snapshot():
     conn = get_db()
     key_rows = conn.execute(
-        "SELECT id,symbol,monitor_type,direction,upper,lower,fib_entry_price,fib_limit_order_id FROM key_monitors"
+        "SELECT id,symbol,monitor_type,direction,upper,lower,fib_entry_price,fib_limit_order_id,created_at FROM key_monitors"
     ).fetchall()
     order_rows = conn.execute(
         "SELECT id,symbol,exchange_symbol,direction,trigger_price,stop_loss,initial_stop_loss,take_profit,margin_capital,leverage FROM order_monitors WHERE status='active'"
@@ -6478,7 +6478,7 @@ def api_price_snapshot():
             prev = false_breakout_gate_preview(
                 entry_display=entry_txt,
                 limit_order_id=_sqlite_row_val(r, "fib_limit_order_id"),
-                created_at=r["created_at"],
+                created_at=_sqlite_row_val(r, "created_at"),
                 now=app_now(),
             )
             gate_summary = prev.get("summary") or "-"